From b0b4e09c1ae71c4ec33df0616b830ae050006e9b Mon Sep 17 00:00:00 2001 From: Matias Bjørling Date: Fri, 16 Sep 2016 14:25:07 +0200 Subject: lightnvm: control life of nvm_dev in driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit LightNVM compatible device drivers does not have a method to expose LightNVM specific sysfs entries. To enable LightNVM sysfs entries to be exposed, lightnvm device drivers require a struct device to attach it to. To allow both the actual device driver and lightnvm sysfs entries to coexist, the device driver tracks the lifetime of the nvm_dev structure. This patch refactors NVMe and null_blk to handle the lifetime of struct nvm_dev, which eliminates the need for struct gendisk when a lightnvm compatible device is provided. Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- include/linux/lightnvm.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index ba78b8306674..5afc2634f332 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -524,9 +524,9 @@ extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *, unsigned long); extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *); -extern int nvm_register(struct request_queue *, char *, - struct nvm_dev_ops *); -extern void nvm_unregister(char *); +extern struct nvm_dev *nvm_alloc_dev(int); +extern int nvm_register(struct nvm_dev *); +extern void nvm_unregister(struct nvm_dev *); void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type); @@ -575,11 +575,14 @@ extern int nvm_dev_factory(struct nvm_dev *, int flags); #else /* CONFIG_NVM */ struct nvm_dev_ops; -static inline int nvm_register(struct request_queue *q, char *disk_name, - struct nvm_dev_ops *ops) +static inline struct nvm_dev *nvm_alloc_dev(int node) +{ + return ERR_PTR(-EINVAL); +} +static inline int nvm_register(struct nvm_dev *dev) { return -EINVAL; } -static inline void nvm_unregister(char *disk_name) {} +static inline void nvm_unregister(struct nvm_dev *dev) {} #endif /* CONFIG_NVM */ #endif /* LIGHTNVM.H */ -- cgit v1.2.3